Rainbow Electronics W90P710CDG User Manual
Page 505
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W90P710CD/W90P710CDG
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COL[0]
COL[1]
COL[2]
COL[3]
A0
A1
A2
GS
16x8 keys
matrix
ROW[15:0]
COL[7:0]
IN[7:0]
74148
ENCODER
74138
ROW[3:0]
W90P710
keypad I/F with 8:3 encoder
Fig. 6.21.1 Keypad Interface with row decoder and column encoder
Keypad Controller 3-keys Configuration Register (KPI3KCONF)
REGISTER ADDRESS R/W
DESCRIPTION RESET
VALUE
KPI3KCONF 0xFFF8_8004 W/R
three-key configuration
register
0x0000_0000
31
30
29
28
27
26
25
24
RESERVED EN3KY
ENRST
23
22
21
20
19
18
17
16
RESERVED K32R
K32C
15
14
13
12
11
10
9
8
RESERVED K31R
K31C
7
6
5
4
3
2
1
0
RESERVED K30R
K30C
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